Take the time to discover your real intention before you act. If it is to change someone or the world so that you will feel safe or better about yourself, don't act on it, because it is an intention of fear and can create only painful consequences.
Cancer. It teaches so much, even as it confounds and confuses. James Dean, whose young life was snatched not by cancer but a car crash, wisely advised, "Dream as if you'll live forever, live as if you'll die today."
You will lose your job. You will have your heart broken. The person you admired will disappoint you. You will make mistakes that you'll regret. You will fall. And you will get up. Life's curveballs are inevitable, therefore position yourself so that the "getting up" part is not so crippling.